No, I'm talking about a real case where there is a "QWidget" main window and NO real child windows (I can check with Spy++), so I know I cannot send win32 messages and I cannot use Win32 apis on them, because they are not Win32 windows. I did all the code to enumerate pseudo-childs with IAccessible interface and get their properties/states I just wanted to find a way to enable/disable one of these pseudo-windows (a pseudo-button (not a Win32 "Button" class), with no window handle) but it seems impossible.

There is only one real window ("QWidget" class which allows me to use AccessibleObjectFromWindow()) but all childs are not windows, so I cannot send win32 messages. I can enumerate them and read their properties (exactly like AccExplorer32 does), but I did not find a way to change them as I cannot interact directly with them using Win32 messages/apis

Is there a way to hide/show, enable/disable a "child" window with IAccessible ? I can only get some values (::get_accState(), STATE_SYSTEM_INVISIBLE, ...) but cannot set them It is for a "QWidget" window class, where all the childs that I enumerate (AccessibleObjectFromWindow(), AccessibleChildren()and so on) have of course no window handle (the same as the parent in fact) and I cannot use standard apis like EnableWindow() or ShowWindow()